This lists all identified correspondents. Their letters can only be accessed through the Letters page.
O'Connor, Thomas Power “T.P.”, 1848-1929 Irish politician, journalist
O'Donnell, T.F. member of the Savage Club
O'Neill, Rose, née Meller actress, wife of Edward O'Neill
Oates, Austin, fl.1890-1910 Secretary to Cardinal Vaughan, layman, social writer
Ochiltree, Thomas Peck, 1845-1902 US marshal, colonel, congressman
Oculist, pseudonym Probably J.L. Toole
Odell, Edwin J., 1835-1928 actor
Ogilvie, Glencairn Stuart, 1858-1932 dramatist
Old Londoners' Club, (Henry W. Burton, Secretary)
Olive, John
Onslow colonel
Onslow, William Hillier Onslow, 4th Earl of, 1853-1911
Oppenheim, Jacob spokesman for the Jewish community
Orchardson, Sir William Quiller, 1832-1910 artist
Orton, Arthur, 1834-1898 the Tichborne claimant